Operation; Ground Resistance Measurement Procedure - AEMC 4620 User Manual

5.1

Ground Resistance Measurement Procedure

(3-Point)
Ground
Strip
WARNING: Use extreme caution when disconnecting the ground connection
from the rest of the circuit. Current may be flowing and a dangerous potential
could exist between the disconnected wires.
• X and Xv (E, ES) are shorted
• Disconnect shorting link between Y and Z (S, H)
• Connect X to the ground rod to be tested
• Connect Y (S) to the center electrode
• Connect Z (H) to the outer electrode
• Depress the "Test" button to measure ground resistance
30

OPERATION

X
Alligator Clips
Ground Rod
CHAPTER 5
Ω
Y Electrode
Figure 15
Digital Ground Resistance Tester Model 4620 and 4630
Z Electrode